VBS/Wscript check if computer exists (remotely/silently uninstall symantec thru script)

Ok.. this is a run-off from a previous question I had.
https://www.experts-exchange.com/questions/22494186/Wscript-VBScript-how-to-write-an-echo-that-disappears-after-a-while-no-OK-or-Confirm-button-like-a-progress-bar.html
I'm creating a script to remotely and silently remove symantec from all computers. It pulls all computer names from "computer.txt" and stores it in an array. Then for each computer, runs code to change registry keys and delete symantec.
I've been testing it out, but the problem is during testing. As a test, I put MY computer name 3 times in the computer.txt file. When I run it, the first time it hits my computer, it looks ok. But anytime after it, it fails, saying computer doesn't exist. This also occurs even if I put 3 different computer names. What's wrong with my error handling? Am I even doing it correctly? So far all the "executable" code is commented out and replaced with alerts. This is how I'm testing it (so I don't mess up the system =P )
Anyone help, please?

'Remove Symantec Remotely and Silently
'Results are stored in a log file: symantec.log

'--------------- Create Log File ----------------
'Open up the path to save the information into a text file
Dim Stuff, myFSO, WriteStuff, timeStamp
timeStamp = Time()

Set myFSO = CreateObject("Scripting.FileSystemObject")
Set WriteStuff = myFSO.OpenTextFile("symantec.log", 2, True)

Dim objShell: Set objShell=CreateObject("Wscript.Shell")

Dim startMsg
startMsg = "STARTING SCRIPT, YO!" & vBCrLF & "You do not neet to click OK until it is done." &_
           vbcrlf & "When the script is done, it will say DONE, YO! Check symantec.log for results."

objShell.Popup startMsg, 3
'WScript.Echo startMsg

WriteStuff.WriteLine("Starting Script, yo!" & vbcrlf)

'-------------------- Grab computer names from Computer.txt and store in array ----------------

strComputers = ""

On Error Resume Next

'Initialize global constants and variables.
Const FOR_READING = 1
g_strHostFile = "computer.txt"

'Read computer names for install from text file.
Set objFSO = CreateObject("Scripting.FileSystemObject")

If objFSO.FileExists(g_strHostFile) Then
  Set objTextStream = objFSO.OpenTextFile(g_strHostFile, FOR_READING)
Else
  WScript.Echo "ERROR: Input file " & g_strHostFile & " not found."
  WScript.Quit
End If

'Loop through list of computers and perform tasks on each.
Do Until objTextStream.AtEndOfStream
  readingInComputer= objTextStream.ReadLine
'  Wscript.Echo VbCrLf & readingInComputer
 
 strComputers = strComputers + readingInComputer +","
Loop

objTextStream.Close

arrComputers = Split(strComputers , ",")
 

'----------------------------- Symnantec Piece---------------------------------
'Pre condition:  arrComputers must be populated from Computer.txt


'------- Insert all Available Keys Here-------------------
Dim strSymantecKeys
strSymantecKeys="{BA4B71D1-898E-4306-AE87-8BA7A596F0ED},{5a633ed0-e5d7-4d65-ab8d-53ed43510284},{a011a1dc-7f1d-4ea8-bd11-0c5f9718e428},{473af7d0-b864-4699-9974-df570c5b6dce},{a011a1dc-7f1d-4ea8-bd11-0c5f9718e428},{50e125d1-88e5-48ce-80ae-98ec9698e639},{33CFCF98-F8D6-4549-B469-6F4295676D83}"
'---------------------------------------------------------


arrSymantecKeys = Split(strSymantecKeys, ",")


For Each strComputer in arrComputers

'On Error Resume Next
      ' '---- If computername is blank then exit loop ---
      '  If strComputer = "" Then
      '     exit for
      '  End If
 
 '----------- Set Uninstall Password & LockUnloadSvcs Registry Key Values-------
 Const HKEY_LOCAL_MACHINE = &H80000002
 Set objReg = GetObject("winmgmts:\\" & strComputer & "\root\default:StdRegProv")



 ' ----If getObject fails, server is offline or doesn't exist -------------
 If err.number <> 0 then
      err.clear

        objShell.Popup "ERROR: "& strComputer & " is offline or doesn't exist", 2
      'wscript.echo "ERROR: "& strComputer & " is offline or doesn't exist"
      
      'write to log file
      WriteStuff.WriteLine(timeStamp & "  " & strComputer & " - ERROR! It is offline or doesn't exist.")
      On Error GoTo 0

 '------ Else GO ahead and remove Registry Keys ---------------------
 Else
   On Error GoTo 0

   strKeyPath = "SOFTWARE\INTEL\LANDesk\VirusProtect6\CurrentVersion\AdministratorOnly\Security"
   ValueName = "LockUnloadServices"

   objReg.GetDWORDValue HKEY_LOCAL_MACHINE, strKeyPath, ValueName, strValue

   If strValue=1 Then
      'objReg.setDWORDValue HKEY_LOCAL_MACHINE, strKeyPath, ValueName, 0
      'WScript.Echo strComputer & ": LockUnloadServices set to: " & strValue
   End If

   ValueName = "UseVPUninstallPassword"

   objReg.GetDWORDValue HKEY_LOCAL_MACHINE, strKeyPath, ValueName, strValue

   If strValue=1 Then
     'objReg.setDWORDValue HKEY_LOCAL_MACHINE, strKeyPath, ValueName, 0
     'WScript.Echo strComputer & ": UninstallPW set to: " & strValue
   End If

   '----- Run MSIEXEC to remove Symantec -------------

  For Each strSymantecKey in arrSymantecKeys

        'WScript.Echo "psexec \\" & strComputer & " MsiExec.exe /norestart /q/x" & strSymantecKey & " REMOVE=ALL"

  Next

  'Print to log file
   WriteStuff.WriteLine(timeStamp & " - " & strComputer & " - Symantec Removed.")

  objShell.Popup strComputer & " - Symantec Removed", 2
  'WScript.Echo strComputer & " - Symantec Removed"


 End If


SET objReg=Nothing
 
 
Next


'Write to log file and close it
WriteStuff.WriteLine(vbcrlf & "Script is Done, yo! Click OK to close.")
WriteStuff.Close
SET WriteStuff = NOTHING
SET myFSO = NOTHING

'Let user know the script is done!
WScript.Echo "SCRIPT IS DONE, YO!!!"